12=5x+42

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Solution for 12=5x+42 equation: 



12=5x+42

We move all terms to the left:

12-(5x+42)=0

We get rid of parentheses

-5x-42+12=0

We add all the numbers together, and all the variables

-5x-30=0

We move all terms containing x to the left, all other terms to the right

-5x=30

x=30/-5

x=-6

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